ライフサイエンスコーパス: nacre

1 toughness-determining structural feature of nacre.

2 iodic stacking of aragonite tablets known as nacre.

3 erface between disordered neonacre to mature nacre.

4 gh performance fibre reinforced concrete, or nacre.

5 totypically tough biological materials, like nacre.

6 nd "brick" pull-out, in the image of natural nacre.

7 and have only once been observed in bivalve nacre.

8 aragonite (pAra), as expected for aragonitic nacre.

9 anular cracking in the aragonite platelet of nacre.

10 ghness of bone and the protection offered by nacre.

11 ypothesized dominant toughening mechanism in nacre.

12 de (chitin) work in concert to form lamellar nacre.

13 eminiscent of the natural sea-shell material nacres.

14 Nacre, a composite made from biogenic aragonite and prot

15 Nacre, a structure found in many molluscan shells, and b

16 nacre, a zebrafish homolog of MITF, is required for pigm

17 layer, including two not previously found in nacre; a novel T-rich Mucin-like protein and a Zinc-depe

18 he mean tablet thickness and its disorder in nacre across entire mollusk shells from red and rainbow

19 a loss modulus 2.4-fold higher than natural nacre and 1.4-fold more than highly dissipative natural

20 Biological materials found in Nature such as nacre and bone are well recognized as light-weight, stro

21 ns in other structural biomaterials, such as nacre and bone, have been studied primarily for their be

22 Protein based composites, such as nacre and bone, show astounding evolutionary capabilitie

23 In this case, the focus is on nacre and bone-inspired structural materials, petals and

24 a synthetic pathway to artificial analogs of nacre and bones represents a fundamental milestone in th

25 ures on the dynamic mechanical properties of nacre and offer design concepts for the manufacturing of

26 o spatially map the structural parameters of nacre and other disordered layered materials.

27 tive IR-vibrational carbonate resonance, the nacre and prismatic regions are consistently identified

28 he genes no tail, chordin, one-eyed-pinhead, nacre and sparse, removing gene function from maternal t

29 We unambiguously demonstrate that prisms and nacre are assembled from very different protein repertoi

30 Shells like nacre are known for the superior fracture toughness due

31 re of EDTA-soluble proteins found in abalone nacre are known to cause the nucleation and growth of ar

32 that stacks of aragonite tablet crystals in nacre are misoriented with respect to each other.

33 ugh natural composites such as bone, silk or nacre are often built from stiff blocks bound together u

34 arrangement-is strikingly similar to that of nacre, as are the mechanisms underlying the robust mecha

35 AP7 is a nacre-associated protein of the mollusk shell that forms

36 llusk, despite roughly similar appearance of nacre at all ages and positions in the shell.

37 nizations required to mimic the structure of nacre by controlled organization of soft and hard materi

38 We postulate that the ductility of nacre can be limited by eliminating tablet interactions

39 The fiber form or nacre can, simplify manufacturing and offer new function

40 Nacre, commonly referred to as nature's armor, is renown

41 In mollusk shell nacre, complex mixtures and assemblies of proteins and p

42 An order of magnitude tougher than nacre, conch shells are known for being one of the tough

43 Here we report that bone, like abalone nacre, contains polymers with 'sacrificial bonds' that b

44 We found strong correlation between nacre crystal misorientations and environmental temperat

45 Furthermore, we show that nacre crystallizes via localised dissolution and repreci

46 Surprisingly, the abalone nacre data show the same ACC phases that are precursors

47 Our investigation of nacre deformation reveals the underlying nanomechanics t

48 etinal pigment epithelium in the fish is not nacre-dependent, suggesting an evolutionary divergence i

49 In nacre, despite extensive attempts, amorphous calcium car

50 cre gene restored melanophore development in nacre(-/-) embryos.

51 Biological materials such as seashell nacre exhibit extreme mechanical properties due to their

52 the elastic properties of organic layers in nacre exhibit multifold differences from the native and

53 These results give new insights into nacre formation and particle-accretion mechanisms that m

54 ant clue with regard to the protein-mediated nacre formation process.

55 als nanoscale details governing the onset of nacre formation using high-resolution scanning transmiss

56 irst direct observation of ACC precursors to nacre formation, obtained from the growth front of nacre

57 organic-molecule control, is fundamental in nacre formation.

58 s imply different tablet growth rates during nacre formation.

59 They were inferred from non-nacre-forming larval shells, or from a residue of amorph

60 erranean mussel, we explore the formation of nacre from the meso- to the atomic scale.

61 Transient expression of the wild-type nacre gene restored melanophore development in nacre(-/-

62 icro- to sub-nanoscale analysis to show that nacre grows in a dynamic two-step process with extension

63 Nacre has a correlation length of roughly 16 tablets (~5

64 Nacre has been common in the shells of mollusks since th

65 brick-and-mortar architecture of biological nacre has inspired the development of synthetic composit

66 oss-section at high resolution, we show that nacre has medium-range mesoscale periodicity.

67 Nacre has naturally occurring mesoscale periodicity that

68 ss of another biocomposite material, abalone nacre, has been found.

69 Biological materials such as nacre have evolved microstructural design principles tha

70 Fabricating a calcitic nacre imitation with biologically similar optical and me

71 dent imaging contrast (PIC) maps of pristine nacre in cross-section.

72 formation, obtained from the growth front of nacre in gastropod shells from red abalone (Haliotis ruf

73 Furthermore, misexpression of nacre induced the formation of ectopic melanized cells a

74 anical performance and failure in 3D printed nacre inspired composites.

75 ranes with proton-conducting 2D channels and nacre-inspired architecture are reported.

76 of exceptionally continuous 2D channels and nacre-inspired brick-and-mortar architecture into one ma

77 We validated our model using nacre-inspired composites fabricated from recycled high-

78 Herein, a nacre-inspired design of ceramic/polymer solid composite

79 t accurately predict the elastic response of nacre-inspired nanocomposites by accounting for all mate

80 e's promise for fabricating high-performance nacre-inspired structural materials in the future is rev

81 Our investigation of the prism-nacre interface reveals nanoscale details governing the

82 ught that the ceramic aragonite platelets in nacre invariably remain shielded from the propagating cr

83 Red abalone (Haliotis rufescens) nacre is a layered composite biomineral that contains cr

84 Nacre is a prevalent example of a complex biological com

85 and therefore demonstrates that ordering in nacre is a result of crystal growth kinetics and competi

86 Nacre is a technologically remarkable organic-inorganic

87 With its "brick and mortar" structure, nacre is an example of a layered material that exhibits

88 Replication of nacre is essential for understanding this complex biomin

89 Nacre is intensely studied because its biologically cont

90 ture, where the organization of materials in nacre is optimized to avoid catastrophic failure.

91 nd found to be strikingly similar to natural nacre: lamellar aragonite with interspersed N16N layers.

92 ineral binding site of N16, a protein in the nacre layer of the Japanese pearl oysters (Pinctada fuca

93 cellular aragonite-associated protein of the nacre layer of the mollusk Haliotis rufescens and posses

94 nanofibrillar aggregation to irregular early-nacre layers, to well-ordered mature nacre suggesting th

95 d our research to develop a scheme to create nacre like lamellar structures of molecular sheets of Ca

96 fabricate bulk transparent materials with a nacre-like architecture that can effectively arrest the

97 ion high-performance solid electrolytes with nacre-like architecture.

98 en assembly of the pre-coated platelets into nacre-like architectures, followed by pressure-assisted

99 site plies into 3D doubly curved shapes with nacre-like architectures.

100 The nacre-like ceramic/polymer electrolyte (NCPE) simultaneo

101 has proven extremely difficult to transcribe nacre-like clever designs into synthetic materials, part

102 Here, we study the damping behavior of nacre-like composites containing mineral bridges and pla

103 Our nacre-like composites display a loss modulus 2.4-fold hi

104 Nacre-like composites have been investigated typically i

105 the mortar phase, we develop and investigate nacre-like composites with high fracture toughness and s

106 hese features on the damping response of the nacre-like composites.

107 Here we demonstrate that nacre-like fibres can be produced by shear-induced self-

108 The nacre-like fibres open a novel technological space for o

109 These advantages of nacre-like materials are here justified analytically and

110 cture-function relationship was confirmed by nacre-like mechanical properties and striking optical ir

111 dient structure featuring a surface layer of nacre-like nanolaminates followed by multi-variant twinn

112 astrong materials but macroscale fibres with nacre-like organization can improve mechanical propertie

113 other sequence features are responsible for nacre matrix protein-protein assembly processes and ulti

114 Here we design a nacre-mimetic graphite-based nanofluidic structure in wh

115 bioinspired ceramic-polymer composites with nacre-mimetic lamellar and brick-and-mortar architecture

116 Long term cycling of full cells using the nacre-mimetic lithium-metal anodes is also demonstrated.

117 iaxial pressing and in situ polymerization, "nacre-mimetic" hydroxyapatite/poly(methyl methacrylate)

118 tiffness exhibited by mollusks and produce a nacre-mimicking metal matrix composite capable of withst

119 ts can be largely explained by disruption of nacre/mitf expression.

120 fish and mammals shares a dependence on the nacre/Mitf transcription factor, but that proper develop

121 Mutations in the zebrafish nacre/mitfa gene, expressed in all embryonic melanogenic

122 scue neural crest melanophore development in nacre/mitfa mutant embryos when expressed via the mitfa

123 Here, we use the zebrafish pigment mutant nacre/mitfa to test roles for genetic and environmental

124 compensate for loss of mitfa function in the nacre mutant but is not expressed in neural crest melano

125 between fms mutants and either wild-type or nacre mutant zebrafish, we show that fms acts autonomous

126 on of early melanoblast markers is absent in nacre mutants and transplant experiments suggested a cel

127 Homozygous nacre (nac(w2)) mutants lack melanophores throughout dev

128 ry measurements of in situ delta(18)O in the nacre of one shell.

129 unicates; (3) the secretion of the prism and nacre of some molluscan shells; (4) the development of s

130 Nacre, or mother-of-pearl, the iridescent inner layer of

131 Nacre, or mother-of-pearl, the tough, iridescent biomine

132 The formation of the nacre pearl in marine invertebrates represents an on-dem

133 al packing is reached, they merge into early-nacre platelets.

134 striations typically appear ~ 15 um from the nacre-prism boundary at the interface between disordered

135 e (PEGDA) hydrogel substrates; however, only nacre proteins induced mineralization localized to the m

136 esults revealed that both PEGylated BMP2 and nacre proteins induced stem cell osteodifferentiation in

137 e stabilization agents such as Mg(II), other nacre proteins, or an organized organic matrix.

138 Similar to other nacre proteins, rPFMG1 oligomerizes to form amorphous, h

139 y processes have been identified for several nacre proteins, these proteins do not contain known glob

140 e pure system by nanomolar levels of abalone nacre proteins.

141 identify a ~ 200 nm region in the incipient nacre region with less well-defined crystal structure an

142 ng methods of structural characterization of nacre rely on some form of cross-sectional analysis, suc

143 ds to zebrafish Lef1 protein in vitro, and a nacre reporter construct is strongly repressed by domina

144 gonite mineral in the mollusk shell or pearl nacre requires the participation of a diverse set of pro

145 Nature's wisdom in nacre resides in its elaborate structural design and the

146 Inspired by nacre's architecture, a ternary nanostructured composite

147 ale thickness ([Formula: see text]300 nm) of nacre's building blocks, the aragonite lamellae (or plat

148 While nacre's design concepts have led to bio-inspired materia

149 hanisms uncover a new toughening strategy in nacre's hierarchical flaw-tolerance design.

150 of polymers and graphene derivatives employ nacre's tested strategy of intercalating soft organic la

151 Over the past decades, our understanding of nacre's toughening origin has long stayed at the level o

152 Researchers hypothesize that nacre's toughness originates within its brick-and-mortar

153 omimetic platelet-matrix composites--such as nacre, silk, and clay-polymer-exhibit a remarkable balan

154 Nacre species-specificity is interpreted as a result of

155 re, if any measurable physical aspect of the nacre structure was correlated with environmental temper

156 r early-nacre layers, to well-ordered mature nacre suggesting the assembly process is driven by aggre

157 ors, on freshly deposited coral skeleton and nacre surfaces, but not on sea urchin spines.

158 equire following all steps taken in biogenic nacre synthesis.

159 ng organic membrane and regions of irregular nacre tablet formation coincident with dispersed organic

160 observed that in red abalone, unexpectedly, nacre tablet thickness decreases with age of the mollusk

161 p data reveal that the nacre ultrastructure (nacre tablet width, thickness, and angle spread) is spec

162 ablets , ~8.5 um), the frequency spectrum of nacre tablets follows [Formula: see text] behavior, sugg

163 rphous material surrounding mature gastropod nacre tablets, and have only once been observed in bival

164 This has far-reaching implications: nacre texture may be used as a paleothermometer of ancie

165 We isolated a promoter region of nacre that contains Tcf/Lef binding sites, which can med

166 Here we present a route to artificial nacre that mimics the natural layer-by-layer approach to

167 serve nanoscale recovery of heavily deformed nacre that restores its mechanical strength on external

168 Nacre, the iridescent material in seashells, is one of m

169 Nacre, the iridescent material of the shells of pearl oy

170 d partially by the layered microstructure of nacre, the material design and large-scale integration o

171 For example, nacre-the inner lining of some mollusk shells-encodes lo

172 The new PIC-map data reveal that the nacre ultrastructure (nacre tablet width, thickness, and

173 Under compression, nacre undergoes deformation of nanograins and non-destru

174 is the first successful attempt to replicate nacre, using CaCO(3).

175 the prepared multilayers approached that of nacre, whereas their ultimate Young modulus was similar

176 Wnt signaling therefore directly activates nacre, which in turn leads to pigment cell differentiati

177 le process results in a nanoscale version of nacre with alternating organic and inorganic layers.

178 shows "brick-and-mortar" structures, akin to nacre, with interesting combinations of strength, stiffn